/*======================================================================

    Utility to look up information about SCSI devices

    scsi_info.c 1.12 1999/07/20 16:04:26

    The contents of this file are subject to the Mozilla Public
    License Version 1.1 (the "License"); you may not use this file
    except in compliance with the License. You may obtain a copy of
    the License at http://www.mozilla.org/MPL/

    Software distributed under the License is distributed on an "AS
    IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
    implied. See the License for the specific language governing
    rights and limitations under the License.

    The initial developer of the original code is David A. Hinds
    <dhinds@hyper.stanford.edu>.  Portions created by David A. Hinds
    are Copyright (C) 1998 David A. Hinds.  All Rights Reserved.
    
======================================================================*/

#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <dirent.h>

#include <linux/version.h>
#include <linux/config.h>

#include <linux/major.h>
#include <scsi/scsi.h>

/*====================================================================*/

static int get_host_no(int host)
{
    DIR *dir;
    struct dirent *ent;
    char fn[128];
    
    dir = opendir("/proc/scsi");
    if (dir == NULL)
	return -1;
    while ((ent = readdir(dir)) != NULL)
	if ((ent->d_ino & 0xff) == host)
	    break;
    closedir(dir);
    if (!ent) {
	perror("could not find SCSI host in /proc/scsi");
	return -1;
    }
    
    sprintf(fn, "/proc/scsi/%s", ent->d_name);
    dir = opendir(fn);
    if (dir == NULL) {
	return -1;
    }
    do {
	ent = readdir(dir);
    } while ((ent) && (ent->d_name[0] == '.'));
    closedir(dir);
    if (ent)
	return atoi(ent->d_name);
    else
	return -1;
}

/*====================================================================*/

int main(int argc, char *argv[])
{
    int i, fd, host, channel, id, lun;
    u_long arg[2];
    char match[128], s[128], vendor[9], model[17], rev[5];
    FILE *f;

    if (argc != 2) {
	fprintf(stderr, "usage: %s [device]\n", argv[0]);
	exit(EXIT_FAILURE);
    }
    
    fd = open(argv[1], O_RDONLY);
    if (fd < 0)
	fd = open(argv[1], O_RDONLY|O_NONBLOCK);
    if (fd < 0) {
	perror("open() failed");
	exit(1);
    }
    if (ioctl(fd, SCSI_IOCTL_GET_IDLUN, arg) != 0) {
	perror("could not get SCSI device info");
	exit(1);
    }

    id = arg[0] & 0xff;
    lun = (arg[0] >> 8) & 0xff;
    channel = (arg[0] >> 16) & 0xff;
    host = ((arg[0] >> 24) & 0xff);

    sprintf(match, "Host: scsi%d Channel: %02x Id: %02x Lun: %02x\n",
	    get_host_no(host), channel, id, lun);

    printf("SCSI_ID=\"%d,%d,%d\"\n", channel, id, lun);
    
    f = fopen("/proc/scsi/scsi", "r");
    if (f == NULL) {
	printf("MODEL=\"Unknown\"\nFW_REV=\"Unknown\"\n");
	exit(0);
    }

    while (fgets(s, 128, f) != NULL)
	if (strcmp(s, match) == 0) break;
    fgets(s, 128, f);
    strncpy(vendor, s+10, 8); vendor[8] = '\0';
    for (i = 7; (i >= 0) && (vendor[i] == ' '); i--)
	vendor[i] = '\0';
    strncpy(model, s+26, 16); model[16] = '\0';
    for (i = 15; (i >= 0) && (model[i] == ' '); i--)
	model[i] = '\0';
    strncpy(rev, s+48, 4); rev[4] = '\0';
    for (i = 3; (i >= 0) && (rev[i] == ' '); i--)
	rev[i] = '\0';
    printf("MODEL=\"%s %s\"\nFW_REV=\"%s\"\n", vendor, model, rev);
    exit(0);
    return 0;
}